Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash	$ 1,992,461	$ 1,618,583
Restricted cash		33,821
Certificates of deposit	2,150,000	2,662,890
Accounts receivable	120,446	113,067
Prepaid expense and other assets	96,098	50,354
Total current assets	4,359,005	4,478,715
Long-term certificate of deposit	1,945,000	950,000
Property and equipment, net	9,218,338	9,295,022
Total assets	15,522,343	14,723,737
Current liabilities:
Trade payables and accrued expenses	177,753	207,166
Income tax payable		13,346
Total current liabilities	177,753	220,512
Deferred income tax payable	187,664	187,664
Total liabilities	365,417	408,176
Stockholders' equity:
Common stock, 3,000,000 authorized, no par value, 1,942,495 issued and outstanding	59,335	59,335
Retained earnings	15,097,591	14,256,226
Total stockholders' equity	15,156,926	14,315,561
Total liabilities and stockholders' equity	$ 15,522,343	$ 14,723,737